Coexistence and interconversion of Di-σ and π-bonded ethylene on the Pt(111) and Pd(110) surfaces

Tomonari Okada, Yousoo Kim, Yasuyuki Sainoo, Tadahiro Komeda, Michael Trenary, Maki Kawai

    Research output: Contribution to journalArticlepeer-review

    20 Citations (Scopus)

    Abstract

    A low-temperature scanning tunneling microscope operated at 4.7 K was used to observe individual molecules of ethylene on the Pt(111) and Pd(110) surfaces following adsorption at 50 K. In both cases, two forms of the molecules were observed and were found to switch from one to the other under the influence of the tip. The form with the greater apparent height is attributed to π-bonded ethylene, and the other form is attributed to di-σ bonded ethylene. The images provide direct evidence that on both surfaces π-bonded ethylene occupies an on-top site and di-σ bonded ethylene occupies a symmetric bridging site. The results are compared with predictions based on DFT calculations that di-σ bonded ethylene should be the most stable form on both surfaces.

    Original languageEnglish
    Pages (from-to)2263-2266
    Number of pages4
    JournalJournal of Physical Chemistry Letters
    Volume2
    Issue number17
    DOIs
    Publication statusPublished - 2011 Sep 1

    Keywords

    • Catalysis
    • Interfaces
    • Surfaces

    ASJC Scopus subject areas

    • Materials Science(all)
    • Physical and Theoretical Chemistry

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